Valve.



F. W. WOLF.

VALVE.

APPLICATION FILED FEB-16.1914.

Patented Nov. 26, 1918.

farce/fir: ed/ if 29 MFW 11 UNITED STATES PATENT OFFICE.

FRED W. WOLF, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE ISKO COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

VALVE.

Specification of Letters Patent.

Patented Nov. 26, 1918.

To all whom it may concern:

Be it known that I, FRED W. WOLF, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Valves and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form apart of this specification.

This invention relates to a valve device for controlling the supply of the refrigerating medium to the expansion coil of a refrigerating apparatus and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

As is well known, in a refrigerating apparatus, the refrigerating medium is supplied to the expansion coils from a receiver containing liquid refrigerant under relatively high pressure. The passage of the refrigerant from the liquid receiver to the expansion coil is ordinarily controlled by what is generally known as an expansion valve through which the refrigerant is allowed to pass in small quantities as it is needed. Said refrigerant, after it has passed through the expansion valve, enters the expansion coil under a lower pressure, wherein it boils and expands in the form of vapor to cool the compartment in which the said expansion coil is located, in a manner well known. After the expanded vapor has performed its functions in the expansion coil, it is returned to the liquid receiver as a liquid under high pressure, by a suitable mechanism, when it may again pass to the expansion valve which admits it to the expansion coil as before.

The obj ect of the invention is to provide a strong, simple and efficient expansion valve which will control the flow of the refrigerant to the expansion coils, and which will not be affected by changes of temperature of the fluid in whichit is located and to provide a valve construction which will permit of its being easily adjusted and taken apart for cleaning or repairs without drawing the refrigerant from the system.

In the drawings:

F igure 1 is a vertical section through a .valve made in accordance with my invention.

Fig.2 is a plan sectional view thro'ugh the same, the plane of the section being indicated by line 22 of .Fig. 1.

Referring more in detail to that embodiment of my invention illustrated in the accompanying drawings, 5v indicates a tubular valve casing which is preferably cylindrical. Said casing containsa chamber 6 that is greater in height than it is in diameter. The casing, as shown, is open at its upper end and closed at its lower end by means of an integral bottom wall 7. Said bottom wall is provided with laterally projecting tubular bosses 8, 9, to which are secured by means of suitable union fittings, inlet and outlet pipes 10 and 11, respectively. The bosses 8 and 9 are provided with passages 12 and 13 respectively, which communicate with the pipes to which the bosses are connected.

14 indicates a fixed apeitured plug which is threaded through the bottom wall 7 of the casing. 7 indicates the aperture through said plug which is preferably in axial alinement with the vertical, central axis of the chamber 6. The said plug 14 is provided at its lower endwith a head 14 to which a wrench or other suitable tool may be applied when threading said plug in said bottom wall.' The body of the plug 14 has a transverse diametric aperture 15 intersecting the vertical aperture 7, either end of which transverse aperture may be brought to register with the passage 12 in the boss 8 corn nected with the inlet pipe 10. 18 indicates a movable valve plug adapted to seat on the upper end of the fixed plug 14: to'close the upper end of the aperture 7 extending therethrough. The aperture 7 a through the fixed plug 14 is threaded to receive a bolt 19. which closes the lower end of said aperture. Said bolt may be adjusted vertically in said aperture so as to restrict the transverse aperture 15 when adjusting the valve. Said bolt is held in its desired adjusted position by means of an associated lock nut 20. Thus the amount of liquid which may pass from the pipe 10 into the chamber 6 when the valve plug 18 is' raised from its seat may be predetermined. The passage 13 formed in the boss 9 and connecting the outlet pipe 11 with the chamber 6, opens into said chamber at one side of the. fixed plug 14.

Within the chamber 6 of the casing 5 is located a weight member 21 which is adapted to control the movable valve plug 18 and which has guiding support within said lchamber so-that it will rise and fall in a vertical direction. Said weight member, as

shown, is cylindrical in cross section and or" a diameter somewhat less than the diameter of the chamber 6 so as to leave a space between said member and the inner surface of the casing wall 5. The weight member 21 is flat at the upper end and spherical at its bottom end, to which is fixed the movable valve plug 18.

The upward movement of the valve plug 18 and of the weight member 21 is limited and the movement of said weight member guided by the following construction: In the fiat top surface of the weight member 21 is formed a central recess 22 into which projects the reduced lower end 23 of a set screw or bolt 24. Said bolt 24 is threaded through a cap 25 secured to the top of the casing 5 and forming the top wall of the chamberfi. The cap 25 is provided with an interiorly threaded annular flange 25 adapt ed for engagement with a threaded flange 26 formed on the upper end of the valve casing 5. A packing ring 27 is interposed between the said cap and the upper end of the casing 5 to prevent leakage from the chamber 6. Said cap 25 is also provided with a stufling box 28 for the bolt 24 to pre- Iioiept leakage from the chamber 6 around said The reduced end 23 of the bolt projecting into the recess 22 guides the member 21 in its vertical movement so that the valve plug 18 will be directed toward its seat on the valve plug 14:. Said bolt 24 also limits the movement of the weight member 21 and of the valve plug 18. This movement may be adjusted by screwing the bolt 2a toward or away from the bottom of the recess 22. Should it be desired to hold the valve stem 18 to its seat and cause it to act as a shut off valve the same may be accomplished by screwing said bolt 24: downward until its bottom end is brought into positive engagement with the bottom of the recess 22 while the valve plug is closed upon its seat.

Should for any reason the valve plug 18 or the apertured plug 14 need repairing, the passages 12 and 13 may be closed by means of bolts 29, 30, which are threaded into suitable apertures formed respectively in the bosses 7 and 8 and extending transversely of the passages 12 and 13.

The operation of the valve is as follows The inlet pipe 10 contains liquid refrigerant under high pressure from the liquid receiver (not shown). Said liquid fills the passage 12, the horizontal aperture 15, and the vertical aperture 7 in the fixed plug 14, and exerts an upward pressure against the valve plug 18, thus tending to lift the weight mem: ber 21. The said weight member 21 will not move until sufiicient pressure has built up in the inlet pipe 10 to overcome and lift the same, when the valve plug 18 will be lifted from its seat.

insane/a After the liquid refrigerant has passed into the chamber 6 the pressure in the inlet pipe is momentarily relieved and the weight member 21 will act under the action of gravity to close the valve plug 18 on its seat. l/Vhen the pressure again builds up sufficiently to lift the weightmember 21, liquid will again pass into the chamber 6 as before. The back pressure in the outlet pipe 11 will not aliect the operation of the weight member for the reason that the fluid entirely surrounds the weight member except for a cross-sectional area thereof equal to the cross section of the valve plug 18.

It is apparent that an expansion valve made in accordance with my invention will not be aflected by change of temperature surrounding the same owing to the absence of springs and the same may be easily adjusted from without the casing. In addition, access to the interior of the casing may be had without shutting down the entire system,

While in describing my invention, I have described certain details of mechanical construction and arrangement, T do not wish to be limited thereby except as pointed out in the appended claims. J

l claim as my invention:

1. A valve comprising a tubular casing providing a chamber and having a base with inlet and outlet passages therein, said outlet passage openin directly into said chamber, an apertured p lug adjustably fixed in said base, one end of said plug being formed to provide a valve seat normally located Within the chamber and the other end of said plug being closed and located without the base, a movable valve plug adapted to close on. said seat, a weight member vertically movable in said chamber and carrying said valve plug, a removable cap for said casing, and means carried by said cap for guiding and limiting the vertical movement of said weight member, said means being capable of an adjustment locking said valve plug on said seat.

2. A valve comprising, a tubular casing providing a chamber and having a base with inlet and outlet passages therein, said outlet passage opening directly into said chamber, an apertured plug having a cross port adaptadjustably fixed in said base, the top end of said plug being formed to provide a valve seat normally located without said base, a weight member vertically movable in said chamber and having a valve plug adapted to normally close on said seat, adjustable means operable from without the casing for -ed for registration with said inlet passage closing the bottom. end of said apertured plug and for restricting said cross port in said plug, a removable cap for said casing, means carried by said cap for guiding and limiting the vertical movement of said weight, said means being capable of an adjustment locking said valve plug on saidseat, and means operable from outside the casing for closing off said inlet and outlet passages in the base of said casing.

3. A valve comprisin a casing providing a chamber and inlet an outlet passages, an

apertured plug forming the inner end of one of said passages, a movable valve adapted to seat on said plug, a weight member movable in said chamber and carrying said movable valve, and means at either end of said valve and accessible from the outside of the easing for adjusting the relation of the valve to its seat on the plug.

4. A valve comprising a casing having inlet and outlet passages,- one of said passages connecting directly with the interior of the casing, an apertured plug in said casing, the other of said passages connecting with the interior of the casing through the aperture in said plug, a movable valve in said casing to control said aperture, and an adjustable plug adapted to vary the eifective size of said aperture and accessible from the outside or" said casing. 7

5. A valve comprising a casing having an opening in its Wall, an apertured plu in said opening formed with a valve seat, a olt adjustable in said plug to vary the effective size of its aperture, said plug and said bolt both being accessible from the outside of the casing, and a movable valve in said casing cooperating with said valve seat.

(3. A valve comprising a casing ha.\ ing an opening in its wall, an apertured plug in said opening formed with a valve seat at its inner end and having its outer end extending outside the casing, a-bolt in said plug adapted to vary the effective size of its aperture and accessible at the outside of said casing, and a movable valve'in said casing cooperating with said valve seat to open and.

close the aperture in said plug.

7. A valve comprising a casing having an opening in its Wall, a plug threaded in said opening and having a longitudinal and a transverse aperture, said plug having a valve seat formed at the inner end of the longitudinal aperture and having its outer end extendin to the outside of the casing, a movable va ve adapted to cooperate with said seat to 0 en. and close the aperture, and a bolt threa ed into the longitudinal aperture from its outer end and adapted to adjust the effective size of the transverse aper-q ture, said bolt being accessible from the outside of the casing.

8. A valve comprising a casing, a movable valve in said casing, a plug threaded into said casing and havin a seat for said movable valve, said plug eing adjustable from the outside of the casing to vary the seating of the valve, and a bolt threaded into the casing opposite said plug and adapted to limit the movement of said movable valve.

9. A valve comprising a casing, a movable valve in. said casing, a plug threaded into said casing'and having a seat for said movable valve, said plug being adjustable to vary the seating of the valve, and a member for said movable valve means to limitthe movement thereof.

10. A valve comprising a casing, a movable valve therein, an apertured plug adjustable in said casing at one end of said valve and forming a seat for said valve, a

.bolt adjustable in the casing at the other end of the valve and forming a limit stog for said valve, and a bolt in said aperture rats plug adapted to vary the efiective size of the aperture. In testimony that I claim the foregoing as my invention I aflix my signature in the presence of two witnesses, this 12th day of February, A. D. 1914.

' FRED W. WOLF. Witnesses:

T. H. ALFREDS, K. M. DOLL. 

